螺栓螺纹三维接触有限元分析

Three-dimensional contact ofthreaded bolt finite element analysis

在对螺栓螺纹的分析中,一般采用的方法是将螺栓简化为轴对称,建立轴对称有限元模型进行分析,即使是建立三维模型也是忽略了螺纹部分对整个有限元模型分析的影响。在一些特殊的分析情况下,这样会大大降低分析的精度。比如,在对螺栓螺纹防松机理方面的研究中,就必须考虑螺纹部分及其接触对整个分析过程的影响,而采用单一的有限元软件又很难完成。正是基于这一原因,根据UG、HyperMesh和ANSYS软件的特点,综合运用其长处可以完成螺栓螺纹从几何建模、网格划分、分析计算到结果处理的整个过程.实例表明,综合运用各种软件,有利于发挥每种软件的优点,大大提高有限元分析的效率。

Generally,we using axis symmetry in the screw thread of bolt finite element analyse. Even though,neglecting the effect of screw thread to the whole three-dimensional finite element model. Reducing precision in some special occasion. For instance ,in research of preventing screw thread of bolt from loosening,it must take into account of the compact of the screw thread and the contact. But it hard to accomplish the mission in using single software. With the issues that finite element analysis using single software is complicated and low efficient,the UG,HyperMesh and ANSYS softwares are synthetically applied in the course of modeling,plotting finite element grids,calculating and analyzing,and result dealing based on their respective characteristic.The example indicates that the comprehensive application of various finite element softwares can exert their corresponding advantages and make the analysis more efficient.